android: the downloads say so in the shade

A Save still running with the app in the background now posts a progress
notice — how many files, the one it is on, a bar, Stop all and Open — and
takes it down when the queue empties. It sits on its own low-importance
channel so it can be silenced without silencing the player's card, and
rides its own dataSync foreground service rather than the media one: a
mediaPlayback service stops itself when the bar empties, a download is not
playback, and nothing else was keeping the process alive for a Save with
nothing playing — which is how the first real Save died, four tracks in.
Stop all goes through the same cancel(id) a row's tap takes, and Transfers
grew the matching button beside Clear finished. The walk pushes two rows
straight into the transfer store and reads the real notification back out
of `dumpsys notification`, without fetching anything.

src/mobile/shell.css

@@ -1513,3 +1513,15 @@ html[data-motion="off"] *, html[data-motion="off"] *::before, html[data-motion="
    with its words already in it (PreviewOverlay.svelte's .sr-announce, at
    phone scale) */
 .sr-live { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
+
+/* The Transfers head's two words: Cancel all while anything is in flight,
+   Clear finished after. The .sec's own small caps, which this head never
+   had — "Clear finished" has been sitting there at body size.
+
+   The space between them goes on the words, NOT on .phead .acts: Library
+   and Community hang their header icons in that same wrapper and they sit
+   flush, so a gap there would push three round buttons apart on two
+   screens this round never looked at. */
+.phead .all { font-size: 12.5px; font-weight: 750; color: var(--text-secondary); white-space: nowrap; }
+.phead .all:active { color: #fff; }
+.phead .all + .all { margin-left: 15px; }